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采用计算流体力学方法研究了带有运动尾缘襟翼的风力机翼型,考察了襟翼偏转角频率对翼型气动参数及非定常特性的影响。结果表明:多数情况下,翼型升力系数滞后于偏转角变化,且相位差随着角频率的增加先增大后减小;尾缘襟翼改变升力系数的能力随着角频率的增加而减小;以尾缘襟翼长度为特征尺度定义的襟翼折合频率可作为尾缘襟翼问题非定常特性的判断准则,当该折合频率大于或接近0.01时,流场具有明显的非定常特性。
The aerodynamic airfoil with moving tail flaps was studied by computational fluid dynamics (CFFL) method. The influence of flap deflection angle on aerodynamic parameters and unsteady characteristics of airfoils was investigated. The results show that: in most cases, the lift coefficient of airfoil lags behind the deflection angle, and the phase difference first increases and then decreases with the increase of the angular frequency; the ability of the tail flap to change the lift coefficient decreases with the increase of the angular frequency The flap flapping frequency defined by trailing edge flaps length can be used as a criterion to judge the unsteady behavior of tail flap flaps. When the flanging frequency is greater than or close to 0.01, the flow field has obvious unsteady characteristics.